Raise for throwing errors in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to raise a RuntimeError with a message.

Ruby

raise [1], "Something went wrong!"

Drag options to blanks, or click blank then click option'

Athrow

Bcatch

CRuntimeError

Drescue

Attempts:

3 left

💡 Hint

Common Mistakes

Using throw or catch instead of an error class.

Omitting the error class and only writing raise.

The raise keyword is used to throw an exception. RuntimeError is a common error type to raise with a message.

2fill in blank

medium

Complete the code to raise a custom error with a message.

Ruby

class MyError < StandardError; end

raise [1], "Custom error occurred"

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AMyError

BException

CError

DStandardError

Attempts:

3 left

💡 Hint

Common Mistakes

Using Exception or Error instead of the custom class.

Not defining the custom error class before raising it.

To raise a custom error, use the custom class name after raise. Here, MyError is the custom error class.

3fill in blank

hard

Fix the error in the code to correctly raise an ArgumentError with a message.

Ruby

raise ArgumentError [1] "Invalid argument!"

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A,

B.

C:

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using a dot or colon instead of a comma.

Omitting the separator between error class and message.

When raising an error with a message, separate the error class and message with a comma.

4fill in blank

hard

Complete the code to raise a ZeroDivisionError with a custom message.

Ruby

raise [1] , "Cannot divide by zero!"

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AZeroDivisionError

BArgumentError

C,

D.

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong error class like ArgumentError.

Using a dot instead of a comma to separate the message.

The error class ZeroDivisionError is raised with a message separated by a comma.

5fill in blank

hard

Fill all three blanks to raise a custom error with a message and rescue it.

Ruby

class [1] < StandardError; end

begin
  raise [2], "Oops!"
rescue [3] => e
  puts e.message
end

Drag options to blanks, or click blank then click option'

ACustomError

DStandardError

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the custom error class.

Rescuing a different error class than the one raised.

Define a custom error class CustomError, raise it, and rescue it by the same class to handle the error.